diff --git a/cpdfmanual.tex b/cpdfmanual.tex
index 2961aab..1fa238c 100644
--- a/cpdfmanual.tex
+++ b/cpdfmanual.tex
@@ -7,6 +7,7 @@
 %Add note to -fast about content sharing (with reference to -chop, but in general too)
 %Document -chop
 %Replace -impose-rtl etc with -rtl etc.
+%Document -extract-images JBIG2 for how to use jbig2dec
 \documentclass{book}
 % Edit here to produce cpdfmanual.pdf, cpdflibmanual.pdf, pycpdfmanual.pdf,
 % dotnetcpdflibmanual.pdf, jcpdflibmanual.pdf jscpdflibmanual.pdf etc.